I am amused as I drive around nowadays and see "Airport" icons on blue informational signs and I have cause to think: "Well, no WiFi or Bluetooth there!" That is probably what children are thinking. They probably wonder why an airport cannot afford WiFi.
Is this good UX, to re-use an already well-established informational sign icon for something with an entirely different meaning?
Update: It was pointed out that there are many radio-emitting aspects of a phone beyond Wifi and Bluetooth and so I suggest that there be a single icon that covers all of the radio emitting aspects, like a little antenna with lightning bolts coming out of it. (I think this already exists...) Could they simply draw the red-circle-with-slash icon over such a Radio Emissions icon? Would that be obvious to everyone?
Further update: Apparently WiFi is allowed on some flights now, so that raises the question of why I see an airplane when I turn off WiFi on my laptop. But... the original question - why was the existing sign icon commandeered for something unrelated (airport nearby vs don't interfere with the plane) - is still very much on the table. I wish people would actually address that question, not the history of "why / how it came to be thus, mumble mumble." Please.
It looks like this is the only wireless setting on my laptop:
"Your part will be to remain calm."